From: Daniel Stone <daniels@collabora.com>
Date: Fri, 22 May 2015 12:34:47 +0000 (+0100)
Subject: drm/mode: Validate modes inside drm_crtc_convert_umode
X-Git-Tag: v4.2-rc1~13^2~41^2~11
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7dec9a9648f825a0698fd875d2834b597f122bd6;p=linux.git

drm/mode: Validate modes inside drm_crtc_convert_umode

The only user of convert_umode was also performing mode validation, so
do that in the same place.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Tested-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7e5085fe4b75..baad4e856006 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1785,11 +1785,15 @@ static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
 static int drm_crtc_convert_umode(struct drm_display_mode *out,
 				  const struct drm_mode_modeinfo *in)
 {
-	if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
-		return -ERANGE;
+	int ret = -EINVAL;
+
+	if (in->clock > INT_MAX || in->vrefresh > INT_MAX) {
+		ret = -ERANGE;
+		goto out;
+	}
 
 	if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
-		return -EINVAL;
+		goto out;
 
 	out->clock = in->clock;
 	out->hdisplay = in->hdisplay;
@@ -1808,7 +1812,14 @@ static int drm_crtc_convert_umode(struct drm_display_mode *out,
 	strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
 	out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
 
-	return 0;
+	out->status = drm_mode_validate_basic(out);
+	if (out->status != MODE_OK)
+		goto out;
+
+	ret = 0;
+
+out:
+	return ret;
 }
 
 /**
@@ -2821,12 +2832,6 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 			goto out;
 		}
 
-		mode->status = drm_mode_validate_basic(mode);
-		if (mode->status != MODE_OK) {
-			ret = -EINVAL;
-			goto out;
-		}
-
 		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
 
 		/*